| abstract |
Provided is a polymer having structural units represented by formula (1) and structural units represented by formula (2). [In the formulas, X 1 and X 2 are each independently an oxygen atom, and the like; Y is a carbon atom, silicon atom, and the like; R 1 , R 2 , R 3 , and R 4 are each independently a halogen atom, a linear, branched, or cyclic C 1-30 alkyl group, and the like; Ar 1 is a C 4-60 tetravalent aromatic heterocyclic group optionally having substitution groups, and the like; and Ar 2 and Ar 3 are each independently C 6-60 trivalent aromatic hydrocarbon groups optionally having substitution groups or C 4-60 trivalent aromatic heterocyclic groups optionally having substitution groups, and the like. When Y is a carbon atom, Ar 2 and Ar 3 are trivalent aromatic heterocyclic groups.] |